It has been suggested that night shift-workers show more variability in their output levels than day workers. Below, you are given the results of two independent random samples. 
a.State the null and alternative hypotheses to be tested.
b.Compute the test statistic.
c.The null hypothesis is to be tested at the 5% level of significance. State the decision rule for the test.
d.What do you conclude?
Definitions:
Stated Value
A value assigned to a corporation's stock for accounting purposes, which may bear no relation to the market value.
Shares
Units of ownership interest in a corporation or financial asset that provide a share in the corporation's profits and a claim on its assets.
Paid-In Capital
The total amount of money raised by a company through the sale of shares to the shareholders, including additional amounts over the nominal value.
Issue Price
The price at which new securities are sold to the public or investors by the issuer when they are first offered.
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